21085168

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:194

約数の個数: 80

約数和(自身を含む): 47809440

約数和(自身を除く): 26724272

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 67, 68, 89, 104, 134, 136, 178, 208, 221, 268, 272, 356, 442, 536, 712, 871, 884, 1072, 1139, 1157, 1424, 1513, 1742, 1768, 2278, 2314, 3026, 3484, 3536, 4556, 4628, 5963, 6052, 6968, 9112, 9256, 11926, 12104, 13936, 14807, 18224, 18512, 19669, 23852, 24208, 29614, 39338, 47704, 59228, 77519, 78676, 95408, 101371, 118456, 155038, 157352, 202742, 236912, 310076, 314704, 405484, 620152, 810968, 1240304, 1317823, 1621936, 2635646, 5271292, 10542584, 21085168]

約数ペア:

[(1, 21085168), (2, 10542584), (4, 5271292), (8, 2635646), (13, 1621936), (16, 1317823), (17, 1240304), (26, 810968), (34, 620152), (52, 405484), (67, 314704), (68, 310076), (89, 236912), (104, 202742), (134, 157352), (136, 155038), (178, 118456), (208, 101371), (221, 95408), (268, 78676), (272, 77519), (356, 59228), (442, 47704), (536, 39338), (712, 29614), (871, 24208), (884, 23852), (1072, 19669), (1139, 18512), (1157, 18224), (1424, 14807), (1513, 13936), (1742, 12104), (1768, 11926), (2278, 9256), (2314, 9112), (3026, 6968), (3484, 6052), (3536, 5963), (4556, 4628)]